Echo with colors on bash.

color.sh

color() {
  _0=$(echo $1 | sed -E "s/^#([A-Fa-f0-9]{3}|[A-Fa-f0-9]{6})//")
  if ((${#2} == 0))
  then
    echo $1
  elif ((${#_0} == 0))
  then
    if ((${#1} == 7))
    then
      _0="$((16#${1:1:2}));$((16#${1:3:2}));$((16#${1:5:2}))"
    else
      _0="$((16#${1:1:1}${1:1:1}));$((16#${1:2:1}${1:2:1}));$((16#${1:3:1}${1:3:1}))"
    fi
    echo -e "\033[38;2;${_0}m$2\033[0m"
  else echo $2; fi
}

Colors on bash console.md

Colors on bash console

Usage

# Allowed color patterns.
color "#0F0"    "Line in \"lime\" color."
color "#dc143c" "Line in \"crimson\" color."

# Not allowed.
color "#dc14" "Not allowed pattern."
color "Text only."

Terminal

• ${\texttt{\color{lime}Line in "lime" color.}}$
• ${\texttt{\color{crimson}Line in "crimson" color.}}$
• ${\texttt{Not allowed pattern.}}$
• ${\texttt{Text only.}}$